Shell Oil Comapny

Egon L Doering

Phillip E Unger

Uday Mahagaokar

Maarten J Van Der Burgt

Jacob H Stil

Clifford C Segerstrom

Matheus M Van Kessel

Paul F Russell

Eugene Alsandor

Gerd Harenslak

The invention is a method for reducing the hydrogen chloride content of a synthesis gas stream by (a) gasifying a carbonaceous feed material in an entrained flow gasifier to produce a gas/solids mixture of hydrogen, carbon monoxide, hydrogen chloride gas, and flyslag particles; (b) passing the gas/solids mixture solids removal zone where at least a portion of the flyslag particles are removed, to produce a gas stream; (c) mixing with the gas stream an alkali metal oxide, hydroxide, bicarbonate, or carbonate to produce a metals/gas mixture; (d) passing the metals/gas mixture to a ceramic candle filter; (e) reacting on the surface of the ceramic candle filter the alkali metal compounds with the hydrogen chloride to produce solid alkali metal chloride; and (f) recovering a gas stream from the ceramic candle filter substantially free of hydrogen chloride and solids.

Method of reducing hydrogen chloride in synthesis gas

A method for catalytically aiding the gasification of a bituminous coal or petroleum coke feed, which includes (a) mixing with a dry carbonaceous feed an additive compound selected from the group consisting of potassium, calcium, sodium, or magnesium carbonates, bicarbonates, or sulfates, and mixtures thereof; (b) gasifying the coal feed in the resulting mixture in an entrained flow gasifier under gasifying conditions and at a temperature of from about 2000.degree. F. to about 3200.degree. F., thus producing a gas primarily including hydrogen and carbon monoxide; and (c) where the additive compound catalytically aids in producing the hydrogen and carbon monoxide, whereby gasification occurs at moderate temperatures.

Gasification process

The invention is a process for quenching a first synthesis gas mixture containing synthesis gas, molten flyash, water, and carbon dioxide and producing additional synthesis gas consisting of (a) passing the first synthesis gas mixture into a first quench zone; (b) introducing into the quench zone a mixture of a liquid carbonaceous quenching medium in a nitrogen or carbon dioxide carrier gas; (c) endothermically reacting the liquid carbonaceous quenching medium with the water and the carbon dioxide in the synthesis gas mixture, thus producing additional synthesis gas consisting of hydrogen and carbon dioxide, and wherein the additional synthesis gas is admixed with the first synthesis gas mixture to form a second synthesis gas mixture; (d) passing the second synthesis gas mixture to a second quench zone; (e) introducing into the second quench zone a cooling gas for admixture with the second synthesis gas mixture, thus cooling the second synthesis gas mixture, where the molten flyash is solidified, and thus forms a third synthesis gas mixture; and (f) passing the third synthesis gas mixture to a solids removal stage for removing the solidified flyash.

Method of quenching synthesis gas

An improved one stage, upflow process for coal gasification whereby a dry particulate carbonaceous material and an oxygen-containing gas are combusted in a vertical gasifier thereby converting the carbonaceous material (coal) into a hot gas. The hot, entrained flyslag gas is then contacted with a cooled, recycled gas in a quench zone, thus cooling the gaseous product stream and causing the molten slag particles to convert to nonsticky flyslag particles. The high level thermal energy from the flyslag-laden gaseous product stream is recovered in a fire tube heat exchanger and the flyslag particles from the gaseous product stream are separated by conventional means and recycled back to the gasifier. The product raw gas is further treated for use in a gas turbine to produce electricity.

One stage coal gasification process

The present invention is directed to a method and apparatus for controlling rapping of heat exchanging surfaces based on the heat transfer coefficient of the exchanger systems.

Controlling rapping cycle

A synthesis gas-power generation complex is disclosed, the complex being characterized by ability to generate sufficient electrical power for internal use and for export, and by structure for improved heat recovery and utilization. A process for synthesis gas production and power generation utilizing these concepts is also disclosed.

Growing community of inventors

Pasadena, TX, United States of America

Egon L Doering